Exercise care because turning the crankshaft or camshaft alone with the timing belt loosened may damage the valves, only minimal movement of the camshaft should be done so that the sprocker marks can be aligned. The timing mechanism is complex and error may cause serious engine damages and hence the timing mechanism must be done by experienced persons and all the work must be checked before starting the engine. The steps to follow include disconnecting the negative battery cable, lifting the vehicle in place, and lifting the lower splash shield. To access the engine the radiator support panel must be moved forward by removing the front bumper then the engine cover, the cooling fan, spark plugs and the drivebelt. The drivebelt tensioner and upper timing belt cover are also to be removed and the engine is to be turned to TDC with no. 1 cylinder, making sure that the mark of the camshaft sprocket coincides with the mark of the timing belt cover. Insert an offset box wrench to ensure that the crankshaft does not rotate when the bolts attaching the pulley are loosened and in the event of need, the drive sprocket retaining bolt may also be removed. Disassemble the lower timing belt cover and, as long as you are reusing the timing belt, label the sprocket and direction of the belt. In the case of the 1.8L engine, compress the tensioner pulley and lock it, and loosen the tensioner pulley nut. In case of the 2.0L engine, the loosen nut of the tensioner pulley is rotated counterclockwise to remove the timing belt. Slowly take off the timing belt, ensuring that there is no wear or damage, as well as examine the tensioner pulley and idler wheel to confirm they work smoothly. Check and replace the worn parts and make sure that the belt is not contaminated. The belt should be replaced in case it is questionable or it has covered more than 60,000 miles. Check the crankshaft by hand before turning on the engine to feel whether there is resistance, which means that there might be a problem. Make sure that the crankshaft is at TDC, and put any parts that are taken off back in place, and loop the timing belt over the crankshaft sprocker being careful to align it and stretch it tautly. In the 1.8L engine, the tensioner has to be adjusted and the gap checked whereas in the 2.0L engine, the belt must be laid through the correct path and tension added. Lastly, position the lower timing belt cover and crankshaft pulley and reset the crankshaft to TDC once more and ensure that all alignment marks are properly completed.